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All results from a given calculation for C2H2O (Oxirene)

using model chemistry: CCSD(T)=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)=FULL/Def2TZVPP
 hartrees
Energy at 0K-152.295517
Energy at 298.15K 
HF Energy-151.649107
Nuclear repulsion energy61.298103
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD(T)=FULL/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3411 3411        
2 A1 1761 1761        
3 A1 1077 1077        
4 A1 880 880        
5 A2 595 595        
6 B1 514 514        
7 B2 3340 3340        
8 B2 954 954        
9 B2 184 184        

Unscaled Zero Point Vibrational Energy (zpe) 6357.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6357.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD(T)=FULL/Def2TZVPP
ABC
1.10849 0.88003 0.49057

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.894
C2 0.000 0.636 -0.464
C3 0.000 -0.636 -0.464
H4 0.000 1.651 -0.795
H5 0.000 -1.651 -0.795

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5
O11.49931.49932.36172.3617
C21.49931.27231.06752.3111
C31.49931.27232.31111.0675
H42.36171.06752.31113.3021
H52.36172.31111.06753.3021

picture of Oxirene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 64.892 O1 C2 H4 133.172
O1 C3 C2 64.892 O1 C3 H5 133.172
C2 O1 C3 50.215 C2 C3 H5 161.936
C3 C2 H4 161.936
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability